I suppose, in the same why that 'whites' have rejected ballad singing (with a some exceptions, of course).

Fat Possum records has done an excellent job documenting the music of blacks who have not rejected the blues. Check out R.L. Burnside, etc.

Or listen to the very much young and alive Blind Boy Paxton (though much of his material is actually pre-blues) . . .

Ragged But Right